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Inland Valleys

Ecoregion in CA

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The Inland Valleys ecoregion has less marine influence on climate compared to other valley regions to the west such as Ecoregions 85b and 85d. It consists of alluvial fans and basin floors immediately south of the San Gabriel and San Bernardino Mountains of Ecoregion 8, and includes the San Jacinto and Perris Valleys toward the south. Ecoregion 85k includes some floodplains along the Santa Ana River. The soil temperature regime is thermic and soil moisture regime is xeric. Vegetation historically included Riversidean coastal sage scrub, valley grasslands, and some riparian woodlands. The ecoregion now is heavily urbanized. A few areas of pasture or cropland persist.

— EPA

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Inland Valleys

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